"High-Income Taxpayers Paid the Majority of Federal Income Taxes. In 2020, the bottom half of taxpayers earned 10.2 percent of total AGI and paid 2.3 percent of all federal individual income taxes. The top 1 percent earned 22.2 percent of total AGI and paid 42.3 percent of all federal income taxes."
https://taxfoundation.org/data/all/federal/summary-latest-fe...
In New Zealand, about 12% of individuals pay about 50% of personal income tax, and the top 3% pay about a quarter. That doesn't take into account the amount they are taxed indirectly through GST or through company tax on companies they own shares in.